I must trade you must trade he must trade we must trade you must trade they must trade
V-ing form
I must be trading you must be trading he must be trading we must be trading you must be trading they must be trading
Perfect
I must have traded you must have traded he must have traded we must have traded you must have traded they must have traded
V-ing perfect
I must have been trading you must have been trading he must have been trading we must have been trading you must have been trading they must have been trading
Negation
Simple form
I mustn't trade you mustn't trade he mustn't trade we mustn't trade you mustn't trade they mustn't trade
V-ing form
I mustn't be trading you mustn't be trading he mustn't be trading we mustn't be trading you mustn't be trading they mustn't be trading
Perfect
I mustn't have traded you mustn't have traded he mustn't have traded we mustn't have traded you mustn't have traded they mustn't have traded
V-ing perfect
I mustn't have been trading you mustn't have been trading he mustn't have been trading we mustn't have been trading you mustn't have been trading they mustn't have been trading
Interrogative form
Simple form
must I trade? must you trade? must he trade? must we trade? must you trade? must they trade?
V-ing form
must I be trading? must you be trading? must he be trading? must we be trading? must you be trading? must they be trading?
Perfect
must I have traded? must you have traded? must he have traded? must we have traded? must you have traded? must they have traded?
V-ing perfect
must I have been trading? must you have been trading? must he have been trading? must we have been trading? must you have been trading? must they have been trading?
Interro-negative form
Simple form
mustn't I trade? mustn't you trade? mustn't he trade? mustn't we trade? mustn't you trade? mustn't they trade?
V-ing form
mustn't I be trading? mustn't you be trading? mustn't he be trading? mustn't we be trading? mustn't you be trading? mustn't they be trading?
Perfect
mustn't I have traded? mustn't you have traded? mustn't he have traded? mustn't we have traded? mustn't you have traded? mustn't they have traded?
V-ing perfect
mustn't I have been trading? mustn't you have been trading? mustn't he have been trading? mustn't we have been trading? mustn't you have been trading? mustn't they have been trading?